Control means for permitting the operation of the washing and rinsing apparatus of a dishwashing machine only when the washing and rinsing chamber of the machine is closed



A 5, 1952 H. F. LYMAN 2,605,776

CONTROL MEANS FOR PERMITTING THE OPERATION OF THE WASHING AND RINSING APPARATUS OF A DISHWASHING MACHINE ONLY WHEN THE WASHING AND RINSING CHAMBER OF THE MACHINE IS CLOSED Filed Jan. 28, 1950 E 5-, 4 H UMI E IQ F L EE MAN.

iatented Aug. 5, i952 UNITED i TATES j aeosaiis -oowmon MEANS, (FOR rBERMlTJING. 1'0PERATI0N'0FTHE WASHING-AND: N; EINGI-APPABATUS'OF Aepis-nwnsum 'CHINEONLY WHEN ZWA'SHINQ AND QRJNSING elem-BER oFTHa-M HINE s CLOSED I Homer F. Eyman, Nutley, N. -J. Application Januaey 28, 1950, Se ria1 No. 141,1 14

Thisl'inyention relates to dishwashingina ohines -and more particularly to control means for a dishWashing machine in which dishes are washed 55nd thereafter rinsed.

In dishwashing machines'of the ty-peto whieh the present invention relates, a rack of 'dishes ,is washed and thereafter rinsed-in a "washing chamber the upper portion of whieh isfforined bya hood adapted to be opened to permit a max of .ldislhes to be inserted in the chamber and v "adanted to be closed during "the washin'gand rinsing operations. Since the dishes arezwashed and-rinsed in eitremely hot wa'ter it "is essen- ;t'ia1 forTthefproteotion of operator that the hood be maintained in a closed pos itiohdiii'i'rig .Tsjuch fw'ash-in'g and rinsing operations a nd th at ith'e I'c'oritfol ineahs controlling the flow -of 'Water to {the i \fashing and --rinsing appa'ratps he in siich fio's'ition when the hood is in opened posi- :ihachiiie having a washing and rinsing cham er the upp'ei' ,p'oi'Ttion of'iiih'ioh is enclosed by .a hood Fadapt'ed 'to be opened 'so that va r'aek o'f dishes 'iiiay be wii iser'ted therein for Washing and rinsing 'Iand which is adapted to be elos'ed Fdii-fing the Wash'ihg and i'i'n'sin'g operation. Means-are broiiideii foi iocking the hood in closed position 'dii ri'ng the Washing and 'rinsing pefa-tio swhioh means fc'ofiipi'ise's latches independently associated with separate controls for controlling" the Washing "and iin'sing mechanism. The latches are operated. by the 'controls to look the hood in sea v.p'o'sitio n'' during both theiiivas'hling and 'in'g ,o iefations and to unlock the hood only er bothfoperation's ar'e Completed and to preien't actuambn o'f theeo'n't'roIs to washing and finisiing fpositionsiivhen the hood is open.

"the washing fand rinsing dpei'ation'sjby segmentfllY-jshabed hood members disposed to formia ic'iiciilar hood for the chamber, the min hers overlapping one another at the top thereof aiid being ic'it altably mounted on pivots extend- :ii g ina pla'ne manyior the-hood sothatone Ii ooiii ine'mber is movable in a 'cbunticl'ockwise r60 4 v ola-i155. (o1; 134F197) "therewith,:eaoh1atch m iwa icily and c iownwardiy iii/i" irection to open "the chamber at one side or the -IIiEi Chi I-i and in the 01313631118 f-di-iection th close the chamber at said oneside- While -the other hOO d member iS I iiQi/"a'b1e in "-diii'tifii(515 8 opposite to the dir eetio n bf' thje fir st -x'iintion'eii ivfi ve-and pe m ing apparatusginQWhehoperated' A diifection oloses the valve to $1361) gfche fici Water tothef-iiiisingfsprays. :Eaehiof the co fr dshes ia's ar' te v v v ft ie, ifog withw 6h sgassqfiiated. Each xh as a ti h extends into "'1 bat-i116:

3 cannot be moved downwardly. Therefore, when the control rods are so set that the electric motor and pump are inoperative and the valve controlling the flow of rinse water is closed, both the washing and rinsing apparatus thereby being inoperative, the hood members are operable toward their open position but when the hood members are in closed position either one of the controlrods may be soset that either the washing apparatus or the'rinsing apparatus is operative but when either one of the controls are thusly set neither of the hood members are movable toward their open position and are retained in their closed position by the latching members.

The. invention will be understood from the following description when considered in connection with the accompanying drawing in which:

Fig. 1 is a plan view of a dishwashing machine embodying the present invention;

Fig. 2 is a side elevational view taken on the line 2--2 of Fig. 1;

Fig. 3 is an isometric view of the upper portion of the control apparatus shown in Figs. 1

and 2 but on an enlarged scale; Fig. 4 is an enlarged view of both the upper and the lower portions of the control apparatus shown in Fig. 2. I Like characters of reference throughout the several views.

refer to like parts 4 Referring to the drawing, Figs. 1 and 2, the n .dishwashing machine to whichthe present invention relates is conventional and comprises a tank of rectangular-shape supported on legs II at the -four corners thereof. The tank is partitioned into a lower portion l2, whieh lower portion contains wash water, and an upper portion [3 by apartition screen i4. L- sha'ped track members [5 and [6 are disposed parallel toone another along opposite sides [land [8 of tank lflgthe track members extending in a horizontal plane substantially flush with-the .top ofthe tank and considerably above screen partition 14. Members i5 and i6 are adapted to receive and support a rack of dishes during the dishwashing and rinsing operations. A revolving dishwashing-s pray pipe l9, which is revolved by force of water flowing therethrough, is disposed b elow the .-track members and above screen [4. Spray pipe l9 has a plurality ofoutlet apertures therein .and receives wash water through a conduit 2| incommunication with the discharge 22 of a pump 23, the suction 24 of which pump com- Zr'rlu'nicateS with the lower portion 12 of tank .Hl through conduit 25; Pump 23 is driven by an electric motor 26 controlled by a switch 21. As :shown diagrammatically in Fig. 4, the .motor receives electricity directly through lead 28 and through lead 29, fixed contact 30, movable 'contact 3! on rod 53 and lead 33. v

The dishes, after washing,'are rinsed in clear hot water from a hot water source by water issuing from outlets of revolving rinse spray -pipe 34, the rinse spray pipe also being revolved by; the force of water flowing therethrough. The rinse spray pipe 34'receives water through con- "duit 36 connected to the outlet 38 of a valve 31. Hot rinse water enters inlet 39 of valve 31 through inlet pipe 39' and flows from'said inlet35 to member 4! whichis' moved downwardly by stem 42to open port 4fl'and permit the flow of water through the valve to the rinse spray pipe 34 and which is moved upwardly to close port and .prevent flow of water through the valve to spray pipe 34. An'upper rinse spraypipe 43 isdisoutlet 38 through port "48 controlledby valve posed a sufficient distance above tracks [5 and it to permit a rack of dishes to be positioned under said rinse spray pipe. Spray pipe 43 receives hot water through conduit 44 in communication with conduit 36.

The top of tank It is enclosed by a semicircular shaped hood 43 comprising two segmentallyshaped members 41 and 48 pivotally mounted in hood-holding brackets 43 and 50 located at the top of opposite sides [1 and [S ot the tank ID to move in clockwise and in counterclockwise directions on an axis extending axially of the hood. The hood segments 41 and 43 overlap one another at the top thereof and extend below the level of the top of tank It and thereinto along the bottom edge of the segments. Each segment has'an actuation knob 5| at the bottom which engages the top edge of tank Hi. Segment 4? is operated into an open position by moving it in a counterclockwise direction and operated into aclosed position by moving it in a clockwise direction while segment 48 is operated into an open position by moving it in a clockwise direction and operated into a closed position by moving it in a counterclockwise direction.

7 Actuationof rinse water control valve 31 is controlled by a vertically extending control rod 52 which acts on stem 42 to cause said stem'to move upwardly and downwardly while'switch 21 is 'actuatedby vertically extending control rod 53.7 Both control rods extend to a point above hood 45 and have knobs 54 and 55-mounted respectively on the top thereof. The control rods are mounted on side 18 of tank H3 in brackets 56 which permit reciprocal movement of the rods vertically upwardly and downwardly.

j Each control rod 52 and 53 has a latch-member associated therewith adjacent the top thereof which latch members cooperate with the hood segments 41 and 48'to lock the hood members against movement to an open position during the washing and the rinsing operations of the dishwashing machine and unlock the hood members so that they may be moved to an open position so that a rack of dishes may be inserted into or withdrawn from the washing chamber or the machine prior to or after the washing and rinsing operations'rThe latch members 51 and 58 are secured respectively to control rods 52 and 53 for vertical movement upwardly and downwardly therewith. Each latch member is substantially L-shaped, the short legs 59 of each latch being secured to acontrol rod and extending toward each other but to a point short of engagement'with one another. The long legs 69 oithe latches project inwardly from legs 59 parallel to one 'another'toward and to a point past the adjacent edge of the hood segments and have a downwardly projeotinglug 6| at said inner end. A'detent 62 is formed in hood segment 48in vertical alignment with lugs 61 of latches 5'! and 58. Thelatches are so positioned in relationship to the control rods that when dishwashing control rod 53 is moved downwardly sutfieiently to close switch 21 and operate the dishwashing spray pipe l9, lug 6| of latch 58 so engages aperture 62 that hood segment 48 ca'nnotbe moved out of its closed position and leg at of latch 58 will be in the pathof movement'of segment 41 so that top edge 41 will engage leg and prevent movement of the segment toits open position and when rinse control rod 52 is moved downwardly sufficiently to 76 operate rinse water control valve 3'I, lug Bl of latch 51 so engages aperture 62 that movement i oE-Segments i4?! and P 48 to their open :position is zprevented in the same manner that movement ithereofiis .prevented .by "latch 58, as hereinabove described. The latches are'also so positioned :on

control rods :52 and 53 that when both rods-are 'in' their uppermost :position lugs 6| are clear "of "aperture 162 :and in spaced relationship with the outer surface of the hood segments. The-hoods can then "be moved in :both clockwise :and counterclockwise directions. When hood member "48 is opened, detent 62 passes beneath hood mem- :be'r 4.1 and is out of alignment with lug 6| of latches 5'! and 58 While opening of m'em'berll "w ill'cover detent 6 2 in member 48. In either event, lugs oflatch'es '51 and 58 are prevented from 'entering detent 62 so thatineither control rod 52 "nor control ro'd 53 "may "be mo'v'ed downwardly a siiflicient distance to respectively -=op crate-valve 3-1 or' switchfll since lug s 6| will fiengage the 'othersui iace of a hood seg merit and -will not, while either hood-segment is in open position, be permitted to enter 'deten't; ii-2 in operation, when contro1-r0ds -52 and 53 are 'i-n -their uppermost position, as shown in Figs. -2; 3- and 4 of the drawing, either hood segment "4'l'=o1"--ho'odsegment '48 may be moved to their open position and -a tray of dishes inserted in the Washing machine to rest on track members t "and -'l-6. 'The'rea-ften-the hood member is returned to its closed position, as shown in Figs. 2, 3- 'a'n'd 4. Controlrod 53is then moved downwardly-by an'opei'a'tor to wash the dishes. When liig-"Bfon latch 58-enters detent 62, movable contact 31 of switch 2 engagesfixed contact o'fsa'id switch permitting electrical current to now from lead -33 through the switch and to motor-'25 through lead 2'9'thereby setting the motor and pump 23in-operation. Actuation of camp '23 causes wish-washing I water to new from the lower part --l 2'--of tank It into spray pipe l9 ther'eby'to wash the dishes. As hereinb'efore set forth, when control rod "53 is'in such position that switch z'l'is closed; lug "6;! of latch 5B prevents movementof segment 48 toward its open position while the 'leg 66 of said latch "prevents niovement'of segment -47 toward its open posi-- tio'nfias edge M of "the "segment will engage said tee.- i-Ipon completion of the washin'goperation, eentrci rod -53 will be moved upwardly disengagingc'ontact's 30 and-'3! ofswitch 21, thereby stopping-motor 2'1 and pump "23, and moving lug 6i aria-ten 58 out of det'ent '6-2 and leg "50 of said laitch out et "the path of 'movenient'fe'dge '41" of segment e1; 7 h

5 i ifter the washing operation "is completed, the Washed dishes are rinsed by moving control rod downwardly which "may be done only when lioodseginentsfl "and 48 are in'the'ir closed positioni "Downward movement of control rod 52 causes valve stem- 12 of Valve 131 to move downwardlyso that whenlug 6| 'of'latdh STiS Within deten't 6 2, verve-member 4| has been'ihovd by said; stemilo'its 'open position in "relationship to porno so-that rinse water'p'assesfrom inlet pipe 39"' through'in1et 39 or the'valve, 'thro igh port "into entree so thence into and through conduits "ligand H-to'spra'y pipes-34 and '43 respectively. When comm rod "52 is such position that valve 3 7 is o en for "new of rinse water there- 'throug'h; lug el of'latch'51 engages detent 62 and In'V'eiits movement of segment fiBftowaTdiitS open position While legfifl 1'atch'5'1 is irrthe path or fmovem'ent "or edge '41 of segment 41 which ji retents movement-of segment ll tow'ard its open position;

llpon onipletionzof the rinsingoperatiomcom ft'rol'. rod :52 '-iS 'move'd upwardly 'by an *operator "which permits-stem 42 :of valve 31 to be moved upwardly (by a spring, as shown in :Fig. 4-) causin'g avalv'e mem'beri'fl tocloseporlt torstoppingi 'the fiow of rinse water "from inlet :39 to outlet "38 of the "valve. Lug 6-! of -la'tch 5! will then be out of engagement with 'detent 62 and "leg 60 of said-latch will be out ofthe path of movement of' edge 4 of segment 4'! so that either ho'od segment may be moved to its open position and the tray of Washed and rinsed dishes removed from the washing machine.

'ilft will be notedfthat when segment 48 is in its open position detent "6'2 isout of alignment with -'li1'g's 61 of latches 51 and 58. Downward movement of-either control rod 53 or 52 will then "be 's'topped'prior to actuation of switch '27 'or valve bl by engagement of lug 6| with the outer surface ofsegment 48; When hood segment 41 isinits ope'nposition, detenttz is beneath said 'hoodsegmerit "and downward movement of "the control "rods will then be stoppedp'rior to actuation of the valve 37 'or switch 2'!- by the control rods 'by "engagement of "lugs 61 with theouter surface of segment '41. 7 7

' Changes may'bema'd'e in the form, location and arrangement of the severalparts of the apparatus'herein'disclosed without departing from the principles of the invention. Accordingly, 'the invention is not to be limited excepting by the scope of the appendedclaims.

What is-claimed is;

1*. Hood locking means forra washing and-rinsing-imachinewithza washing andrinsing chamber enclosed at the top thereof by a substantially semi-circular hood comprising a an. overlapping section and an "overlapped section, each section being segmentally-shaped and rotatably mounted on an axis :extending in a plane axially 0f the hood sotha't one hoo'd section is movable in a counterclockwise direction to an 'opened "position to thereby open the'chamber atone side of the machine and in the opposite-direction to -a closed position to thereby close the chamber at said one'side While the other hood Section is movable 'in directions opposite "respect'ivel y'to the directions of the first mentioned hood-section to open and to close the side of the chamber opposite said'one side, the chamber havingwashing means and rinsing means therein through which washing fluid and rinsing fluid is directed'r'espectively onto articles'to thereby wash and to'ther'eby rinse s'aidarticles, a source of washing 'fluid, a source of rinsing fluid, "control means for controlling theflow of washing fiuid fromthe washing fluid source 'to'the washing means, and other control means for controlling the flow of rinsing fluid 'from the rinsing fluid source to said rinsing means, said hood locking means comprising a latch member 'operatively associated with said control means, another latch member opera'tively associated with 'the other control means, the overlapped hood section having latch. receiving means j therein 's'o disposed .as to be coveredlby said overiappingsection when either section of the hood 'isinoved toward its opened position and toloeuncovered when said sections are "in their closed position, each latch member being constructed to engage saidlatch receiving rneans when the hood sections are in their closed position and to extend into thepath of -movement towardi'ts open position of the overlapping hood section and thereby lock both the hood sections against movement in said closed position, the

latch member and the other latch member each being mounted for movement toward and away from the latch receiving means and so that in their unlocked position the latch members are away from and out of engagement with said latch receiving means and out of the path of movement toward its opened position of the overlapping hood section, said control means being responsive to the movement of the latch'member so as to permit theflow of washing fluid from said washing fluid source to the washing means only when said latchmember is in its locked position, said other control means being responsive to the movement of said other latch member so as to permit the flow of rinsing fluidlfrom said rinsing fluid source to said rinsing means only when said other latch member is in its locked position.

' 2. Hood locking means for a washing and rins- 4 ing machine with a washing and rinsing chamber enclosed'at the top thereof by a substantially semi-circular hood comprising an overlapping section and an overlapped section, each section being segmentally-shaped and rotatably mounted on an axis extending in a'horizontal plane axially of the hood so that one hood section'is movable in a counterclockwise direction to an opened position to thereby open the chamber at one side of the machine and in a clockwise direction to a closed position to thereby close the chamber at said one side while the other hood section is movable in directions opposite respectively to the directions of the first-mentioned hood section to open and toclose the side of the chamber opposite said one side, the chamber having washing means and rinsing means therein through which washing fluid and rinsing fluid is directed respectivelyonto articles to thereby wash and to thereby rinse said articles, a source of washing fluid a source of rinsing fluid, control means for controlling the flow of washing fluid from the washing fluid source to the washing means, and other control mean for controlling the flow of rinsing fluid from the rinsing fluid source to said rinsing means, said hood locking means comprising a latch member operatively associated with said control means, another latch member operatively associated with the other control means, the overlapped hood section having latch receiving means therein. so disposed as to be covered 2 by said overlapping section when either section of the hood is moved toward its opened position and to be uncovered when said sections are in their closed position, each latch member being constructed to engage said latch receiving means when the hood sections are in their closed position and to extend into the path of movement toward its open positionof the overlapping hood section and thereby lock both the hood sections against movement inrsaid closed "position, the latch member and the other latch member each being mounted for vertical movement toward and away from the latch receiving means and so that in their unlocked position the latch members are away from andflout of engagement with the latch receiving means and out of the path of movement toward its opened position of the overlapping hood section, said control means being responsive to'the'movement of the latch member so as to permit the flow of washing fluid from said washing fluid source to the Washing means only'when said latch member is in its locked position, said other control means being responsive to the movement of said other latch member so as to permit the flow of rinsing fluid from the rinsing fluid source to said rinsing means only when said other latch member is in its locked position. l

3. Hood-locking means for a washing andrinsing machine with a washing and rinsing chamber enclosed at the top thereof by a substantially semi-circular hood comprising an overlapping section and an overlapped section, each section being segmentally-shaped and rotatably mounted on an axis extending in a plane axially of the hood so that one hood section is movable in a counterclockwise direction to an opened position to thereby open the chamber at one side of the machine and in a clockwise direction to a closed position to thereby close the chamberat said one side whilethe other hood section is movable .in directions opposite respectively to the directions of the first-mentioned hood section to open and to close the side of the chamber opposite said one side, the chamber having washing means and rinsing means therein through which washing fluid and rinsing fluid is directed respectively onto articles to thereby wash and to thereby rinse said'articles, a source of washing fluid. a source of rinsing fluid, control means for controlling the flow of washing fluid from said washing fluid source to the washing means, and other control means for controlling the flow of rinsing fluid from said rinsing fluid source to said rinsing means, said hood locking means comprising a latch member operatively associated with said control means, another latch member operatively associated with the other control means, the overlapped hood section having latch receiving means comprising a detent therein so disposed as to be covered by said overlapping section when either section of the hood is moved toward its opened position and to be uncovered when said sections are in their closed position, each latch member being constructed to enter the detent when the hood sections are in their closed position and to extend into the path of movement toward its opened position of the overlapping hood section and thereby lock both the hood sections against movement in said closed position, the latch member and the other latch member each being mounted for movement toward and away from the detent and so that in their unlocked position the latch members are away from and out of said detent and out of the path of movement toward itsopened position of the overlapping hood section, said control means being responsive to the movement of the latch member so as to permit, the flow of washing fluid from the washing fluid source to the washing means only when said latch member is in its locked position, said other control means being responsive to the movement of said other latch member so as to permitthe flow of rinsing fluid from the rinsing fluid source to said rinsing means only when said other latch member is in its locked position.

4. Hood locking means for a washing and l'iIlSv ing machine with a washing and rinsing chamber enclosed at the top thereof by a substantially semi-circular h-ood comprising an overlapping section and an overlapped section, each section beingsegmentally-shaped and rotatably mounted on an axis extending in a horizontal plane axially of the hood so that one hood section is movable ina counterclockwise direction to an opened position to'thereby open the' chamber at one side of the machine and in a clockwise direction to a closed position to thereby close the chamber at said oneside' while the other hood 'sectiongis aeoame:

malleable-in directions opposite *resp ectivelyvto the directions-oi thefirst-mentioned. hood section to; open-and to closeithe side of thechamber oppo site; said. one side, the chamber. having washing, means-andrinsing meanstherein through whichv waShingg-fluidzand rinsing fluid. is directed respectively'onto articles to. thereby wash, and thereby ninse.= said1articles, a. source of; washing fluid; a

source of rinsing; fluid, control means for. con;

trolling-the-flow of? washing; fluid from said washing;fluid;source to the-washing means, andother controlmeans; for'controlling theflow of rinsing; fluid immr the; rinsing; fluid. source to said rins- 111%; means; said hood; lockingmeans comprising, vertically extending. rods mounted; for; recipr.o-

cal; longitudinal movement upwardly and downwardly,. one. of said rods; being. operative1yassociated with said control means and anotherrod beingoperatively associated with said other controli means so that downward movement of said actuatesthe control means to permit flow of washingfluid; from said washing fluid source to the-washing means and downward movement or said'other rod actuatessaid other control means to permit flow of rinsing fluid from said rinsing fluid source to said rinsing means and so that upward'movement of said rods respectivelyoperates the.control means 'andiother control means to; prevent flow of fluid from said washing fluid. sourceaand said'rinsing fluid source. to said: washing and rinsingmeans' respectively; a latch memberrmountedonsaidrone; rod, another latchmemhen mounted; on saidother' rod, the overlapped hoodzsectionhaving lat ch receiving-means therein.

so; disposed: as to: be coveredby said overlapping section when either section of. the hood is moved towards its opened. position: and. to. be uncovered whensaid sections are in their closedposition, the.

latch membersbeing so mountedon said rodand. saidiother rod as to have. longitudinal movement downwardly with said rods to engage saidlatch:

receivingameansonly when the hood sections are in their closed position and. to extend into the path of movement toward its opened position of. the: overlapping; hood section and thereby lock bothv the hood: sections in said closed position, thelatchmembers also being mounted for longitudinal movement upwardly with said rods and away: from the hood and said: latch. receiving: means and: outof: thepath of movement" toward its; open: position of: the: overlapping hood sec-- tion-,.the=latchi member and other latch member.

being? so: positioned; onthecontro-l' rod and: said other-control roidi respectively that said control rodtoperateszthe. control means to permit the flow" of washingifiuid from said washing fluid source-to thezzwashing means only when said latchrmember is; in v its locked position and said. other control:

rod operates said other control means to permit:

position-to therebyopen the. chamber at one-side of the-machine and in a: clockwise direction to. aclosediypos-ition to thereby close the chamber at-said one side while the: other; hood section; is;

10 movable indirections oppositesrespectively tothe directions of the first-mentioned hoodrsectionitoopen and'to. closethe side of the. chamb'eroppo sitesaid oneside, the; chamber havingwashing." meansandir-insing means therein through. which. washing. fluidand rinsing fluid. is directed re.- spectively onto articles to therebywash, and to; thereby rinsesaid articles, a source 0t washing, fluid; asource of rinsing fluid; control means for:- controlling th6 flOW' of washing fluid from said; washing fluid source to the washing means-,and: other control means for controlling; the flow 10f.- rinsing fluid' from said rinsingfluidsourceto-said; rinsing means, said hoodlocking: means m vertically--extendingrods mounted for; recip roca-l longitu'dinalmovement upwardlyand down-.-- wardly; one of: said rods being, operatively' 3:550, ciated; withsaid: control means and another rod: being operatively: associated with-said other C0111: trolmeans so that? downward movement otsaid: rod'operates the controlmeans to permit flow-01. washing. fluid from said washing fluid source: to the washing? means: and downward movement :01 saidother rod-operates'saidother control means; to permit flowof rinsing-fluidfromsaid rinsing; fluid sourcetotherinsing means andzsoi-thati upwardmovement of 'saidrods respectivelycauses operation of the control means and other control: means to prevent flow'ofr fluidzfrom saidiwashingf and rinsing j fluid sources to; said washin'g' :axnd1 rinsing means 1\ respectively, a: latch member: mounted on. said, one rod. foronly longitudinal: movement therewith, another l'atchI member: mounted: on said other rod for only longitudinali movement therewith, each of'the'latch'members; comprising a; portion. extending substantially: horizontally toward the: hood: and; a projection; exten'ding'downwardly toward the: hood, thezox er lapped hood sectionhavinglatch receivingmeansi comprising a detent therein. sodisposedi asitoib'ez covered by: said overlapping: sectionwhen: either: section; of: the. hoods-is. moved toward: itsz'openedz positiorrand to be. uncovered. wherr said sections? are in. their closed position, the. latch: members; beingso mounted on: said? rod; andsaidro-theri' that" the projection". thereon engagesrthe hood and prevents: downward i'movement of thex rods: whena hood section is outof' its closed"po"sitiorr:v and so that. theaprojectionsienterisaidadetehtiandf said i horizontally extending: portions of theflatcha members. extend? into the path of: movement Ito,-

ward its opened position of? the overlappingihoodi section preventingi movement thereof: when the?- hood' sections. are in their" closed: positionfithe:

latch members. also: being mounted for menu dinal. movement upwardly. with said -rods atvay from the hood and said detent to thereby move said. horizontal portion'of 'the latches out o'f th epath of movement toward its op'ened' position 'of the overlapping hood sectiorrand -therebyimove said projection onthei'l-atclr members out of the detent, the latchmember: and othenlat'ch; member being so operatively 'associated with the control rod and: said other control rod 'respec-- tively that? said controlrodi operates the contro'l means to permitthe-flow'of washing fluid from said. washing-z fluid sourcefl'to' tliezwashing'zme'ansfi only when theiprojection onsaidvlatchmemberfis' in said detent "and: said other control rddIOp61 ates said other control means to? permit the-flow of rinsing fluid. from: the rinsing fluid souncei-ttr said; rinsing: means only when the proi ection IOII' saidiother' latch. memberis'in said 'detent; j I.

6. A washing and' rinsing machinezhavingta: washings-and rinsing chamber; a: substantially 11 semi-circular hood enclosing the top of said chamber, the hood comprising an overlapping section and an overlapped section, each section being segmentally-shaped and rotatably mounted on an axis extending in a horizontal plane axially of the hood so that one hood section is movable in a counter-clockwise direction to an opened position to thereby open the chamber at one side of themachine and in a clockwise direction to a closed position to thereby close the chamber at said one side while the other hood section is movable in directions opposite respectively to the directions of the first-mentioned hood section to open and to close the side of the chamber opposite'said one side, washing means and rinsing means in the chamber through which washing and rinsing fluid is directed respectively onto articles to thereby wash and to thereby rinse said articles, a source of washing fluid, a source of rinsing fluid, control means for controlling the flow of washing fluid from said Washing fluid source to the washing means, other control means for controlling the flow of rinsing fluid from said rinsing fluid source to said rinsing means, hood lockingmeans comprising vertically extending rods mounted on said machine for reciprocal longitudinal movement upwardly and downwardly only, one of said rods being operatively associated withsaid control means and another rod being operatively associated with said other control means so that downward movement of said rod operates the control means to permit flow of washing fluid from said washing fluid source to the washing means and downward movement of said otherrod operates said other control means to permit flow of rinsing fluid from said rinsing fluid source to the rinsing means and so that upward movement of said rods respectively causes operation of the control meansand other control means to prevent flow of fluid from said washing. and rinsing fluid sources to said washing andrinsing means respectively, a latch member mounted on said one rod, another latch member mounted on said other rod, the overlapped hoodsection' having latch' receiving means thereinso disposed as to be covered by said overlapping; section when either section of the hood is moved-toward its opened position and to be uncovered when said sections are in their closed position, the latch members being so mounted on said :rod and said other rod as to havelonly longitudinal movement downwardly with said rods to'engage said latch receiving means when the hoodsections are in their closed position and to extendintothe path of movement toward its opened position of the overlapping hood section and'thereby lock both the hood sections in said closed position, the latch: members also being mounted for only longitudinal movement up Wardly with said rods and away from the hood andsaid latch receiving means and out of the path of, movement toward its opened position of the overlapping hood section, the latch member and other latch member being so operatively associated with the control rod and said other control rod respectively that said control rod operates the' control means to permit the flow of washing fluid from the washing fluid source to the washing means only when said latch memberis in its locked position and said other control rod operates said other control means to permit the flow o-f rinsing fluid from said rinsing fluid source to said rinsing means only when said other latch member is in its locked position.

' 7.:A washing and rinsingmachine having a one side of the machine and in a clockwise direction to a closed position to thereby closethe chamber at said one side while the other hood section is movable in directions respectivelyopposite to the directions of the first-mentioned hood section to open and to close the side of the chamber opposite said one side, washing and rins-' ing means in the chamber through which washing fluid and rinsing fluid is directed respectively onto articles to thereby wash and thereby rinse said articles, a source of washing fluid, a source of rinsing fluid, control means for controlling the flow of washing fluid from the Washing fluid source to the washing means, other control means for controlling the flow of rinsing fluid from the rinsing fluid source to said rinsing means, hood locking means comprising vertically extending rods mounted on said machine for reciprocal longitudinal movement upwardly and downwardly only, one of said rods being operatively associated with said control means and another rod being operatively associ ated with said other control means so that downward movement of said rod operates the control means to permit flow of washing fluid from the Washing fluid source to the washing means and downward movement of said other rod operates said other control means to permit flow of rinsing fluid from the rinsing fluid source to the rinsing means and so that upward movement of said rods respectively causes operation of the control means and other. control means to prevent flow of fluid from said washing and rinsing fluid :sources to said washing and rinsing means respectively, a latch member mounted on said one rod for only longitudinal movement therewith, another latch member mounted on said other rod for only longitudinal movement therewith, each of the latch members comprising a portion extending substantially horizontally toward the hood and a projection extending downwardly toward the hood, the overlapped hood section having latch receiving means comprising a detent therein so disposed as to be covered by said overlapping section when either section of the hood is moved to- I Ward its opened position and to be uncovered when said sections are in their closed position, the latch members being so mounted on said rod and said other rod that the projection thereon engages the hood and prevents downward movement of the rods when a hood section is out of its-closed position and so that the projections enter said detent and said horizontally extending portions of the latch members extend into the path of movement toward its opened position of the overlapping hood section preventing movement thereof when the hood sections'are in their closed position, the latch members also being mounted for longitudinal movement upwardly with said rods away from the hood and said detent to thereby move said horizontal portion of the latches out of the path of movement toward its opened position of the overlapping hood section and thereby move said projection on the latch members out of the detent, the latch member and other latch member being so operatively associated with the control rod and said v 7 REFERENCES CITED other control rod respectively that said control The-[following references are of record in the rod operates the control means to permit the flow ee this patent;

of washing fluid from said washing fluid source f to the washing means only when'the projection 5 UNITED STATES PATENTS on said latch member is in said detent and said Number Name Date other control rod operates said other control 1,117,550 Coburn et a1 Nov. 17, 1914 means to permit the flow of rinsing fluid from 1,989,065 Johnston Nov. 6, 1934 the rinsing fluid source to said rinsing means 2,279,619 Fisher Apr. 14, 1942 only when the projection on said other latch 10 member is in said detent.

HOMER F. LYMAN. 

